Cutting-machine.



0. JOHNE.

CUTTING MACHINE.

APPLICATION IILED APR. 21, 1913.

1,131,706, Patented Mar. 16, 1915.

2 SHEETS-SHEET l. A

Fig.1

THE NORRIS PETERS CO" PHOTU-IJTHO" VIASHINGmN, D C

O. JOHNE.

CUTTING MACHINE.

APPLICATION FILED 311.21, 1913.

1,131,706, Patented Mar.16, 1915.

2 SHEETSSHEET 2.

THE NORRIS PETERS 60., PHOTO'LITHO., WASHINGTON, D. C,

OTTO JOHNE, 0F BAUTZEN, GERMANY.

CUTTING-MACHINE.

Application filed April 21, 1913.

To all whom it may concern:

Be it known that I, OTTO JOHNE, a citizen of the German Empire, and residing at Bautzen, Germany, have invented certain new and useful Improvements in Cutting- Machines, of which the following is a specification.

Paper cutters provided with automatic pressers which need not be adjusted for various heights of paper to be out, are known to the art. But such machines can hardly be termed practical, as the tension of the automatic presser becomes greater as the knife enters the paper and obtains its greatest tension when the knife has finished its cutting operation. The disadvantage of the foregoing is apparent, since the presser has not been clamped sufficiently upon the paper before. the cutting operation to insure a straight or uniform cutting edge. Applicant overcomes the above objections in providing an arrangement whereby the presser has been clamped upon the paper to its greatest extent beforethe knife enters the paper and the tension exerted upon the presser and consequently the paper 1s uniform throughout the entire cutting operation of the knife.

One illustrative embodiment of my invention is represented by way of example in the accompanying drawings, wherein Figure l is a front elevation of a machlne according to my invention, Fig. 2 1s a crosssection taken on the bent line AA in Fig. 1, and Fig. 3 a sectional plan.

Referring to the drawing, fast on the shaft 9 are the crank-disks 10, 11, whose pins 12 engages in known manner the connectingrods 13 for the knife-carrier 3. Inside the walls of the frame and on the right and left hand sides the shaft 9 carries fast on it the gears 14 which mesh with the gears 7 the latter being provided with eccentrically mounted pins 15 and coupled with the yoke or bar 5 by means of draw-rods 6. A sleeve 4 is journaled on the shaft 9 and is provided with arms 16 and 17. The arms 16 at the ends of this sleeve are connected to the connecting-rods 8 for the cutter-beam 2. The yoke or bar 18 engages the middle arms 17. Between the bars 5 and 18 are located the springs 1 which are held together by means of the stay-bolts 19. When the crank-disk Specification of Letters Patent.

Patented Mar. 16, 1915.

Serial No. 762,657.

10 is rotated in the direction indicated by the arrow, the wheels 14 and 7 are rotated. The draw-rods 6 connected to the wheels 7 there fore impart to the bar 5 a horizontal reciprocating motion, and to the beam 2, which is connected to the bar 5 by the rods 8, the sleeve 4: and the springs 1 a vertical reciproeating motion. By suitably adjusting the pin 12 for the knife-carrier 3 and the pin 15 for the beam 2 it can be arranged that during the first quarter revolution the springs 1 are given their maximum compression and compress the pile of paper, while during the next quarter revolution the springs are kept at their maximum compression when the knife is cutting the pile of paper. When the very heavy knife-carrier 3 and beam 2 move upward the energy stored in the .springs l is advantageously used, so that consumption of power is saved.

I claim l. A paper cutting machine, comprising in combination, an automatic spring actuated paper presser, a positive knife cutter adjacent said presser, said presser adapted to compress the paper before and during the operation of the knife, and serving to help raise the knife to inoperative position.

2. A paper cutting machine comprising in combination, an automatic spring actuated paper presser, a positive knife cutter, said presser adapted to compress the paper before and during the operation of the knife, said paper presser actuated by springs, one end of said springs adjacent a shaft and the other end secured in a yoke which is secured to a driving means attached to said shaft and the presser, substantially as described.

3. A paper cutting machine comprising in combination, a frame, an automatic spring actuated paper presser, a positive knife cutter adjacent said presser, a shaft revolubly mounted in said frame, a connection between said cutter and said shaft adapted to actuate said cutter, a horizontally disposed spring secured to said frame, gears carried by said shaft, and means connecting said gears to said spring and said presser, said means serving to simultaneously compress said spring and presser, simultaneously with the depression of said cutter, substantially as described.

4. A cuttlng machine comprislng 1n com bination, an automatic presser adapted to nonadjustably compress various size stacks of material, a cutter adjacent said presser, said presser and cutter adapted to be simultaneously actuated, said presser adapted to exert maximum pressure on the material. before said cutter enters the material and adapted to exert a uniform pressure during the cutting operation, substantially as described.

In testimony whereof, I affix my signature in the presence of two Witnesses.

' OTTO J OHNE.

Witnesses:

PAUL AREAS, CLARE SIMON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, I). (3,3. 

